TY - CPAPER AU - Müller, Adrian AU - Wittmer, Andreas T1 - The end of international business air travel? T2 - 24th ATRS World Conference PY - 2021 T4 - Pandemics, climate change, and the need to meet C7 - Air Transport Research Society (ATRS) C1 - Online, 26.-29. August M4 - Citavi ER -